4Yang Bangjie, Pei Zhiyuan, Zhang Songling. RS-GIS-GPS-based agricultural condition monitoring systems at a national scale[J]. 农业工程学报,2001,17(1):154-158.
5Iver Thysen. Agriculture in the information society[J]. J Agric Eng Res,2000,76:297-303.
6Wang Maohua. Information technology alters the roadmap to agricultural modernization[J]. Computers and Electronics in Agriculture, 2002,36:91-92.
